Invention Grant
US5473760A Device and method for interface effective/ineffective state judging by
varying threshold voltage to an input receiver circuit
失效
通过向输入接收机电路改变阈值电压来判断接口有效/无效状态的装置和方法
- Patent Title: Device and method for interface effective/ineffective state judging by varying threshold voltage to an input receiver circuit
- Patent Title (中): 通过向输入接收机电路改变阈值电压来判断接口有效/无效状态的装置和方法
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Application No.: US130553Application Date: 1993-10-01
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Publication No.: US5473760APublication Date: 1995-12-05
- Inventor: Nobuhiro Horiuchi
- Applicant: Nobuhiro Horiuchi
- Applicant Address: JPX Osaka
- Assignee: Mita Industrial Co., Ltd.
- Current Assignee: Mita Industrial Co., Ltd.
- Current Assignee Address: JPX Osaka
- Priority: JPX4-274442 19921013
- Main IPC: G06F11/30
- IPC: G06F11/30 ; G01R31/04 ; G06F3/00 ; G06F13/00 ; G06F13/14 ; G06F13/40 ; G06F9/00 ; G06F11/00 ; G06F11/22
Abstract:
The level of an input signal to an interface is judged at a first threshold value and a second threshold value. The first threshold value and the second threshold value are values within the amplitude range of the input signal. The first threshold value is higher than the input signal in a case where the interface is an ineffective state. The second threshold value is lower than the input signal in a case where the interface is in the ineffective state. If the interface is in the ineffective state, therefore, the result of the judgment of the level of the input signal at the first threshold value and the result of the judgment of the level of the input signal at the second threshold value differ from each other. It is judged whether the interface is in an effective state or in the ineffective state depending on whether or not the results differ from each other.
Public/Granted literature
- US06164143A Tip flow barrier for a pitot tube type of fluid flowmeter Public/Granted day:2000-12-26
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